noun
a Latin phrase meaning 'for the use of the Dauphin', referring to a series of classical texts edited for the education of the son of Louis XIV of France
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The book was translated ad usum delphini for the students to read in their Latin class.
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I found a Latin textbook ad usum delphini at the library for my homework.
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I borrowed my friend's ad usum delphini book to help me with my Latin homework.
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The museum displayed a replica ad usum delphini of an ancient Roman artifact.